Home > DIY > M-Class > W166 M-Class (2012-Present) > Fuse Relays M-Class W166 2012-Present Mercedes-Benz ML 250 350 400 550 63 GLE AMG
w166 ml class benz gle fuses location chart

Fuse Relays M-Class W166 2012-Present Mercedes-Benz ML 250 350 400 550 63 GLE AMG

Trying to find the fuse box location on your Mercedes-Benz? Whether looking for the cigarette ligher, radio , COMAND or Navigation fuse location, here you will find all of them.

Location of the fuse box panels on Mercedes-Benz?

  • Engine Bay Fuse Box (Passenger Side)
  • Engine Bay prefuse Box ( Engine bay, by the hood hinge, pass. side)
  • Fuse box in the interior of vehicle. Side of dash on the pass. side.
  • Prefuse box under the passenger seat.
  • Rear fuse box, by the rear seat.
  • Fuse box for battery protection. By rear battery in trunk, passenger side.

Fuse Types Used on Mercedes-Benz

The ATO and MAXI fuses are installed on the fuse box panels. All these fuses can be purchased on Amazon, links provided below. They are inexpensive when purchased online.

Fuse Guide Applications

Model: ML350 ML400 ML550 ML63 AMG ML250 Diesel
Years: 2012 2013 2014 2015 2016
Chassis: W166, GLE
Make: Mercedes-Benz

Interior Fuse Box -Dashboard, Passenger Side

w166 fuse box interior location

Interior fuse box is located on the side of dash. You will find the fuse box if you look at passenger side of dash. A plastic cover can easily be removed. Use a Dash Trim Removal Tool to avoid damaging the dashboard.

Fuses located in the dashboard.

Fuse Location, Purpose, Designation Ampere
10 Ignition Lock 7.5
11 Steering column 10
12 Instrument cluster 5
13 Blower fan air conditioner 15
14 Connector 5
15 Upper control panel 5
16-18 not used
19 Air Conditioner 15
20 Steering column 5
21 Audio / Radio / COMAND /Stereo 5
22 not used

Fuse and relay box under the rear seat

w166 fuse location chart

To access this fuse box you will need to fold the rear passenger seat forward. Under the seat you will see a box which has the relays and fuses inside. To access the fuses, press on the tabs of the front of the box, and lift up the panel cover.

List of fuses under the rear seat. Here you will find fuses F100 to F157.

Fuse Function, Purpose, Designation Ampere
100 Radio, COMAND, Navigation, Stereo DVD, Nav 5
101 Trailer Hitch 20
102 Driver Seat Controls 7.5
103 Passenger Seat Control 7.5
104 Telephone / Antenna Amplifer 5
105 Navigation 5
106 Lift gate 5
107-109 Not used
110 AdBlue for diesel engines 5
111 Trailer Hitch Connection 15
112 Fuel Electronics 5
113 Parking brake 5
114 Exterior lights 5
115 Trailer hitch 5
116 Distronics plus, Blind Spot Assist, Active Lane Keeping SENSORS 5
117 Night View Assist 5
118 Not used
119 Transfer Case 5
120 Fuel Sensor 5
121-123 Not Used
124 Brake Control Conector 30
125 Not used
126 Trailer Hitch 15
127 Driver seat Controls 30
128 Trailer Recognition 20
129 Passenger Seat Controls 30
130 Trailer Recognition 20
131 Not Used
132 Fuel System 25
133 Stationary Heater 5
134 Seat occupancy Sensor, child sensor, front passenger 5
135 Light bulb glove compartment 5
136 SRS, Airbag 7.5
137 Camera, Toll Conection 15
138 Anti-roll system, car stabilization 15
139 Not used
140 AdBlue System for Diesel Vehicles 7.5
141 AdBlue System for Diesel Vehicles 15
142 AdBlue System for Diesel Vehicles 20
143 Not used
144 Not used
145 Cup Holder / Temperature 7.5
146 Rear window heater 30
147 Radio / Comand / Audio / Navigation 30
148 Cigarette Lighter / Output 15
149 Not used
150 Outlet 12 volt back / trunk / cargo area 20
151 Outlet back seat, socket 12 volt 20
152 Control Unit N10/8 30
153 115 Volt Outlet fuse – AC Converter 25
154 Rear ligt gate 40
F157 Circuit 15R1 15

Relays under the rear seat

Relay Purpose
A Power Outlet
B Rear window heater relay
C Backup
E Circuit 15
F Rear window wiper
G Circuit 15R1
H Not used
I Backup

Engine Compartment Fuse Box

w166 m-class gle fuse box location engine bay

A fuse and relay box is located in the engine bay on the passenger side. To access this panel, open the hood and look on the left side of the engine. You will see the fuse box, right behind the headlight. Remove the fuse cover by pressing on the locking tabs. Here you will find fuses F201 to F241.

Fuse Purpose, Function, Designation Ampere
201 Not used
202 Stationary Heater 20
203 Alarm, Antitheft System 5
204 ESP 25
205 Horn 15
206-212 Not used
213 Engine Electronics 7.5
214 Engine Electronics 15
215 Radiator Actuator, Connector 15
216 Engine Compartment Electrical, Engine Mount 15
217 Electrical Connector 20
218 Not Used
219 PAir cooler pump 10
220-228 Not used
229 Left headlight 7.5
230 ESP Electronic Stability Program 5
231 Right headlamp 7.5
232 Tranmission control unit 15
233 Bi-xenon head light lamp, intelligent light 15
234 DISTRONIC, Active Blind 5
235 Wipers 20
236 Not used
237 Intellignet module, Direct Select 30
238 AIRMatic Air Suspension, Adaptive Damping System 40
239 Windshield wiper motor 30
240 Starter Motor 30

Resources and useful links.

Here is a list of useful resources related to the fuses and relays on the Mercedes-Benz M-Class W166 and GLE. These are external links.

What fuse type do I need to replace a blown fuse?

Your Mercedes-Benz uses Automotive Blade Fuse Type. A box of 100 fuses which include all the different ampere ratings that you need cost less than $20 on Amazon.

  • fuse amere ratingWhen replacing blown fuses, make sure to use the same ampere rating fuse. The fuse rating is written on the fuse. You can verify that you are using the correct fuse, by making sure the fuse colors for the blown fuse and the new fuse match. This indicates the same ampere rating.
  • Make sure to properly close the fuse box cover and lock the tabs properly. This is very important to avoid any moisture getting inside the fuse box. The fuse box panel has a seal that is designed to keep water and moisture out of the box.

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